Application of Bioactivity Assay on Evaluating Process Performan- ce of Nitrification and Denitrification for Plastic Wastewater Treatment

• Main Authors: Pu Shun Chung, 卜訓中
• Other Authors: Cheng Sheng Shung
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/23421584573610986675

碩士 === 國立成功大學 === 環境工程研究所 === 82 === The objective of this study is to establish the standard operation process(SOP) of Biochemical Methane Potential(BMP) test,Specific Oxygen Uptake Rate Test(S.OUR),electrolytic respirator(E.R)and Biochemical Nitrogen Potential(BNP)test for evaluating the bioactivity and biodegradability of anaerobic, aerobic and anoxic microbes existed in the plastic wastewater treatment plants. Two labscale-pilot processes are simulated and performedtoin vestigate the function biological nitrification and denitrification.The nupgrading strategy is tried to promote the removal efficiency of total nitrogen. In BMP test,the plastic wastewater can be degraded by the anaerobic sludge which is acclimated with organic-nitrogen wastewater at 55℃.However,20hours of initial lag time shows that the different wastewaster characteristics of organic nitrogen tends to two stages of biodegradation with the two wavemethanegas production curve in the batch test.On the other hands,the aerobic activated sludge degrades theorganic carbon with COD removal of 60~90﹪,and dominates the organic nitrogen with 35~60﹪ conversion.This batch test with the electrolytic respirator shows that TOC degradation is faster than the organic nitrogen cleavage with 140hours of lag phase in the aerobic biosystem. In BNP test,the settled sludge drew from the final classifier can degrade methanol and nitrate with 95﹪ of NO3-removal. The same sludge can also degrade the plastic wastewater with 60~93﹪ of NO 3-removal. Denitrification functionis expectedto bepromoted withl imited aeration in the step-influent process.Results of the pilot study indicate that two stages of oxic and anoxic unit combination can achieve high process performance of CODs removal at 83﹪, TOC removal at 89﹪, organic-nitrogen convesion at 77﹪ and total nitrogen removal at 53﹪.The anoxic unit contributes to more than a half of TOC and TKN removal for this plastic wastewater with rational process modification of nitrifiation and denitrification.